Honeywell T8501 User Manual download pdf

® U.S. Registered Trademark

INSTALLATION INSTRUCTIONS

69-0925-4

T8501

Microelectronic Thermostats

APPLICATION

The T8501 Microelectronic Thermostats provides electronic control of 24 Vac single-stage heating and cooling

systems. Refer to Table 1 for a general description of the thermostat. All T8501 thermostats require a common wire to

supply power.

MERCURY NOTICE

If this control is replacing a control that contains

mercury in a sealed tube, do not place your old

control in the trash. Dispose of properly.

Contact your local waste management authority

for instructions regarding recycling and the

proper disposal of the old control.

INSTALLATION

When Installing this Product...

1. Read these instructions carefully. Failure to follow

the instructions can damage the product or cause

a hazardous condition.

2. Check the ratings given in the instructions and on

the product to make sure the product is suitable for

your application.

3. Installer must be a trained, experienced service

technician.

4. After completing installation, use these instructions

to check out the product operation.

Location

Install the thermostat about 1.5m (5 ft) above the floor in

an area with good air circulation at average temperature.

See Fig. 1.

Do not install the thermostat where it can be affected by:

— drafts, or dead spots behind doors and in corners.

— hot or cold air from ducts.

— radiant heat from sun or appliances.

— concealed pipes and chimneys.

— unheated (uncooled) areas such as an outside wall

behind the thermostat.

Wallplate Installation

The thermostat can be mounted horizontally on the wall

or on a 2 in. x 4 in. (50.8 mm x 101.6 mm) wiring box.

Position wallplate horizontally on the wall or on a

2 in. x 4 in. (50.8 mm x 101.6 mm) wiring box.

1. Position and level the wallplate (for appearance

only). The thermostat will function properly even

when not level.

2. Use a pencil to mark the mounting holes.

See Fig. 2.

3. Remove the wallplate from the wall and drill two

3/16 inch (76 mm) holes in the wall (if drywall) as

marked. For firmer material such as plaster, drill

two 7/32 inch (5.56 mm) holes. Gently tap anchors

(provided) into the drilled holes until flush with the

wall.

4. Position the wallplate over the holes, pulling wires

through the wiring opening.

5. Loosely insert the mounting screws into the holes.

6. Tighten mounting screws.

Table 1. Description of T8501 Thermostats.

System Changeover System Selection

Fan

Selection Comments

Heat-Cool Automatic Heat-Off-Cool-Auto On-Auto System and fan selections are done by

keyboard.

1 2 3 4 5 6 ... 11 12

Summary of Contents

Page 1 - Microelectronic Thermostats

Page 2 - 69-0925—4 2

T8501 MICROELECTRONIC THERMOSTATS69-0925—4 10TROUBLESHOOTING GUIDETable 5. Troubleshooting Guide.Symptom Possible Cause ActionDisplay will not come on

Page 3 - Mounting Thermostat

T8501 MICROELECTRONIC THERMOSTATS11 69-0925—4Cooling will not come on.No power to the thermostat. • Check that C terminal is connected to the system t

Page 4 - INSTALLER SETUP

69-0925—4 G.H. Rev. 04-04 www.honeywell.com/yourhomeT8501 MICROELECTRONIC THERMOSTATSAutomation and Control SolutionsHoneywell Honeywell Limited

Page 5 - 5 69-0925—4

T8501 MICROELECTRONIC THERMOSTATS69-0925—4 2Fig. 1. Typical location of thermostat.Fig. 2. Mounting the wallplate.WIRINGAll wiring must comply with l

Page 6 - 69-0925—4 6

T8501 MICROELECTRONIC THERMOSTATS3 69-0925—4Fig. 4. Typical hookup in heat and cool system with one transformer.Fig. 5. Typical hookup in heat and coo

Page 7 - INSTALLER SYSTEM TEST

T8501 MICROELECTRONIC THERMOSTATS69-0925—4 4Using Thermostat KeysThe thermostat keys are used to:• set the temperature, • display present setting, • c

Page 8 - 69-0925—4 8

T8501 MICROELECTRONIC THERMOSTATS5 69-0925—4Fig. 10. Display of all LCD segments..Fig. 11. Display of Installer Setup number and setting.CAUTIONEquipm

Page 9 - CHECKOUT

T8501 MICROELECTRONIC THERMOSTATS69-0925—4 6IMPORTANTReview the settings to confirm that they match the system. Press Run Program to exit the Installe

Page 10 - TROUBLESHOOTING GUIDE

T8501 MICROELECTRONIC THERMOSTATS7 69-0925—4INSTALLER SYSTEM TESTUse the Installer System Test to check the thermostat operation. Refer to Table 3 for

Page 11 - 11 69-0925—4

T8501 MICROELECTRONIC THERMOSTATS69-0925—4 8Key or Switch Operation System-TestaIMPORTANTTest numbers are displayed only when the system is configured

Page 12

T8501 MICROELECTRONIC THERMOSTATS9 69-0925—4THERMOSTAT INFORMATION1. Press the i key to access the thermostat informa-tion.2. Press the increase ! key

Comments to this Manuals

No comments

Honeywell T8501 User Manual

Browse online or download User Manual for Thermostats Honeywell T8501. Honeywell T8501 User's Manual

Summary of Contents

Comments to this Manuals

Related products and manuals for Thermostats Honeywell T8501